TY - GEN
T1 - Canonical correlation between the gamma and X-ray data of Swift GRBs
AU - Balázs, L. G.
AU - Horváth, I.
AU - Mészáros, P.
AU - Tusnády, G.
AU - Veres, P.
PY - 2009
Y1 - 2009
N2 - We used the canonical correlation analysis of the multivariate statistics to study the interrelation between the gamma (Fluence, 1sec Peakflux, duration) and X-ray (early X flux, 24 hours X flux, X decay index, X spectral index, X HI column density) data. We computed the canonical correlations and variables showing that there is a significant interrelation between the gamma and X-ray data. Using the canonical variables resulted in the analysis we computed their correlations (canonical loadings) with the original ones. The canonical loadings revealed that the gamma-ray fluence and the early X-ray flux give the strongest contribution to the correlation in contrast to the X-ray decay index and spectral index. An interesting new result appears to be the strong contribution of the HI column density to the correlation. Accepting the collapsar model of long GRBs this effect may be interpreted as an indication for the ejection of an HI envelope by the progenitor in the course of producing the GRB.
AB - We used the canonical correlation analysis of the multivariate statistics to study the interrelation between the gamma (Fluence, 1sec Peakflux, duration) and X-ray (early X flux, 24 hours X flux, X decay index, X spectral index, X HI column density) data. We computed the canonical correlations and variables showing that there is a significant interrelation between the gamma and X-ray data. Using the canonical variables resulted in the analysis we computed their correlations (canonical loadings) with the original ones. The canonical loadings revealed that the gamma-ray fluence and the early X-ray flux give the strongest contribution to the correlation in contrast to the X-ray decay index and spectral index. An interesting new result appears to be the strong contribution of the HI column density to the correlation. Accepting the collapsar model of long GRBs this effect may be interpreted as an indication for the ejection of an HI envelope by the progenitor in the course of producing the GRB.
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U2 - 10.1063/1.3155879
DO - 10.1063/1.3155879
M3 - Conference contribution
AN - SCOPUS:70450191988
SN - 9780735406704
T3 - AIP Conference Proceedings
SP - 209
EP - 211
BT - Gamma-Ray Burst - 6th Huntsville Symposium
T2 - 6th Huntsville Symposium on Gamma-Ray Bursts
Y2 - 20 October 2008 through 23 October 2008
ER -